simplify version check

qtcreator.pro

 #version check qt
-TOO_OLD_LIST=$$find(QT_VERSION, ^4\.[0-4])
-count(TOO_OLD_LIST, 1) {
-    message("Cannot build the Qt Creator with a Qt version that old:" $$QT_VERSION)
+contains(QT_VERSION, ^4\.[0-4]\..*) {
+    message("Cannot build Qt Creator with Qt version $$QT_VERSION.")
     error("Use at least Qt 4.5.")
 }